# Welcome

Harmony is an open and fast blockchain. Our mainnet runs Ethereum applications with 2-second transaction finality and 1000 times lower fees.

Harmony is your open platform for assets, collectibles, identity, governance. 

## Build on Harmony

This Gitbook document has introduction and resources for all audience:

* **🎶** [General](https://docs.harmony.one/home/general/introduction) – technical features, application showcases, ecosystem partners, community channels.
* **🏗️** [Developers](https://docs.harmony.one/home/developers/getting-started) – web3 toolkits, deploy tutorials, open bounties, hackathon prizes.
* **🌏** [Network](https://docs.harmony.one/home/network) – token wallets, delegator economics, validator setup, governance dao.

## Bridge to All Chains

* **🧠** [crypto ∩ ai](https://xn--qv9h.s.country/) – Market Research by Founder, Stephen Tse
* **💪** [Roadmap](https://blog.harmony.one/p/harmony-2025-ai-agents-defi-on-exchangeone) – AI Agents, DeFi on Exchange.one, 1-Second Finality